I believe the intent is to make sure that the local static Config (in getConfigHelper()) is initialized in a thread safe way (i.e. 2 threads don’t both try to call the constructor). In C++03, that isn’t actually guaranteed, but in C++11, it is (see e.g. http://stackoverflow.com/questions/8102125/is-local-static-variable-initialization-thread-safe-in-c11 <http://stackoverflow.com/questions/8102125/is-local-static-variable-initialization-thread-safe-in-c11>) I think what you should do is remove configHelperFla, getConfigHelper() and callOnceHelper(), and change getConfig() to read: Config & getConfig() { static Config c; return c; } > On May 7, 2015, at 10:12 PM, Jacek Becla <[log in to unmask]> wrote: > > I'd also welcome help with migrating this line: > > boost::once_flag configHelperFlag = BOOST_ONCE_INIT; > > (it is in core/modules/wconfig/Config.cc) > > std does not have equivalent, so it is a bit > unclear how to migrate it (to me anyway) > > Related reading > http://stackoverflow.com/questions/4200813/stdonce-flag-equivalent-of-boost-once-init > > Jacek > > ######################################################################## > Use REPLY-ALL to reply to list > > To unsubscribe from the QSERV-L list, click the following link: > https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=QSERV-L&A=1 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the QSERV-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=QSERV-L&A=1